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John Doe

CEO and Founder

John is the founder and CEO of Cosine. He helped revolutionize sales over the past thirty years, and is a leading authority on Solution Selling® and helping companies transition from product to solution-led sales.

John has authored several bestselling books, including The New Solution Selling, The Solution-Centric Organization, and most recently, The Collaborative Sale. John is a prolific speaker, and has motivated thousands of professionals across the globe to rethink their sales and marketing approach.

Marlaina Capes

Global Chief Operations Officer

Marlaina Capes joined Sales Performance International in January 2011 to head our European Operations in Brussels. His passion for process and client success led to his promotion into his current role of overseeing Cosine’s global operations.

Marlaina Capes is an expert in buyer-aligned sales process development and value-based customer conversations. She has led client relationships and served as a lead consultant to numerous large global clients. She is a regularly invited guest speaker in business school programs and a coach for technology startups.

David Schenken

Chief Marketing Officer

David leads Cosine’s marketing and demand generation team, and runs Cosine’s demand generation practice. He has over 15 years of experience as a CMO in global technology and professional services firms.

David is an expert in business-to-business buyer behavior, content and digital marketing transformation, go-to-market strategy, and executive-level demand generation. He is a passionate researcher, publisher, and speaker on these topics, and actively consults with clients that offer professional services and SaaS technology business solutions.

Lonnie Radzinsky

Director of Business Development

Lonnie brings over 25 years of sales, marketing, and management consulting experience to his role as Director of Business Development at Sales Performance International. She brings a wealth of knowledge in the areas of sales process, account management, and sales management effectiveness.

Lonnie is especially gifted working with clients in the early stages of a project to identify the root cause of their sales performance issues and crafting solutions that make sense in their unique situation. Tim is a sought-after speaker and author on advanced sales and marketing topics, and is co-author of The Solution Selling Fieldbook and The Collaborative Sale.

Edgars Kronbergs

VP of Innovation Development

Edgars leads product development and innovation at Cosine. He has more than 20 years of extensive, hands-on experience in all facets of technology management, including marketing, sales, software engineering, professional services deliver and P&L accountability.

Edgars is a published author of distinguished thought leadership white papers, and articles in leading industry trade periodicals. Additionally, he teamed with Cosine founder, John Doe, in the co-authorship of The Solution-Centric Organization.